Improvement in churn-thermometers



No. 120,464, Pafentedoct. 31, 1871.I

UNITED STATES VPATENT CFFICE.

JAMES HARVEY SMILEY, OF CAROLINE, NEW YORK.

Specication forming part of Letters Patent No. 120,464, dated October 31, 1871.

To all whom it may concern:

Be it known that I, J AMES HARVEY SMILEY, of Caroline, Tompkins county, INew York, have invented an Improved Dairy-Thermometer, whereof the following is a speciticat-ion:

My object is to make a very sensitive thermometer for use in churning, and my invention consists mainly in the arrangement and construction of an air-chamber back of the tube and about the bulb of the thermometer in the handle of the churn-cover, for the purpose of facilitating the making of butter thereby, as will be apparent as I describe it.

Figure 1 is a-n ornamental cover-handle, made to screw in a hole in the cover, and contains the thermometer. The air circulates, as I shall de scribe further on, and the degree of the thermometer can be read at pleasure. Fi g2 is an cndview of the handle, showing the fiat bulb in its cavity in its lower end; and Fig. 3 is a section of the cover-handle. Fig. 4 is a longitudinal section of the handle, showing the construction of the various parts.

In Fig. 1, A is the thermometer, with a bulb, B, lattened, as shown by the dotted lines (l, the cavity in the lower end of the handle D; and E is a glass plate over the register-plate F, which plate curves backward behind vthe stem of the thermometer'. Back of this is an air-chamber, I, which air-passage exten ds above the thermometer and opens by one or more holes, H, with the air outside of the churn. In Fig. 2, B is the thermometer-bulb, flattened in the cavity of the lower end of the handle D. The air-space is seen about the bulb. In Fig. 3 the mode of arranging the parts is more clearly seen. The central circle J is the thermometer-stem; and F is the registerplate, curved behind the stem, cutting 011 the air and da-mpn ess from the thermometer, the stem at its top and bottom being packed in rubber or putty 5 and E is the glass plate that covers the register-plate and thermometer; and I is the airch amber behind the plate F. The outer circle is that of the exterior of the handle of cover or dasher. and air-chamber in section, designated by the same letters.

The advantages and uses of my invention are apparent to those skilled in the art to which it appertains.

I claiml. The air-chamber I, constructed about the bulb B, extending upward and back of the register-plate F to the upper part of the handle D, where it opens to the atmosphere by the holes H, substantially in the manner set forth.

2. In combination with and constructed within the handle of a churn-cover, the thermometer J B, the register-plate F, the air-chamber I, and the glass face-plate E, substantially as set forth.

JAMES HARVEY SMILEY.

W'itnesses:

SAMUEL J. PARKER,

B. TARBELL. (45) Fig. 4 shows the handle, thermometer, 

